When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
In 2006, a woman was found in her London flat, skeletonized, after 3 years of being dead – with the TV still running.
When the "Elephant Whisperer" Lawrence Anthony died, a whole herd of elephants arrived at his house to mourn him.